Hammer and trigger mechanism for two barreled pistol



Sept. 3, 1957 A. M. HuGHl-:L ETAL l 2,804,709

-HAMMER AND TRIGGER MECHANISM FOR TW BARRELED PISTOL Filed April 2o. 195e [g 30 /l n Ill 2,804,709 Patented Sept. 3, 1957 HAMMER AW TRIGGER MECHANISM FOR TWO Y BARRELED PIS'EL Alvin M. Hughei and .lohn C. Buchanan, Seattle, Wash. Application April 20, 195e, Serial No. 579,532

Claims. (Cl. 42-42) This invention relates to firearms and has reference more particularly to a trigger and hammer mechanism for a two barreled breech loading pistol wherein the firing pin for one barrel is disposed above that for the other.

It is the principal `object of this invention to provide a novel, practical, simpliiied and relatively inexpensive hammer and trigger mechanism that is common to both barrels of the pistol.

It is a furtherobject of the invention to provide a trigger and hammer mechanism that is common to both barrels of the pistoi and which is so arranged that the pull on the trigger that cocks and then releases the hammer for tiring one barrel places the trigger and hammer parts in such position that the next pull on the trigger operates automatically to cock and release the hammer to fire the other barrel of the pistol.

It is also an object of the invention to provide a mechanism of the above character wherein all parts are compactly associated, and are conined in the hand grip portion of the pistol.

Further objects of the invention reside in the details of construction of parts embodied in the invention, in their assembled relationship and in their mode of operation, as will hereinafter be fully described.

In accomplishing the above mentioned and other objects of the invention, we have provided the improved details of construction, the preferred forms of which are illustrated in the accompanying drawings, wherein:

Fig. 1 is a side View of a two barreled pistol equipped with a trigger and hammer mechanism embodied by the present invention; parts of the hand grip or handle portion being broken away for better showing of hammer and trigger mechanism.

Fig. 2 is an enlarged side view of the trigger and hammer mechanism.

Fig. 3 is a horizontal sectional detail, taken on line 3-3 in Fig. 2.

Referring more in detail to the drawings:

The pistol to which the present mechanism is applied, as shown in Fig. 1, comprises a hollow handle, or hand grip portion 1t) and the barrel section 11 that is hinged to an arm 11x that extends forwardly from the hand grip by a transversely directed pivot pin 12. The mounting of the barrel section is such that, when it is released, or unlatched, it can be opened for placing the cartridges in the breech ends of the two barrels.

The barrel section comprises the two coextensive barrels 13 and 14, one directly above the other and each of which has its breech end mounted in a collar or block 15 that is common to both.

When the barrel section 11 is in closed position, as shown in Fig. l, it can be latched against release by any suitable releasable latch mechanism, for example, such as that designated at 16.

Mounted in the hand grip portion 10, at its forward end, is a breech block 18 against which the inner ends of the barrels 13 and 14 and collar 15 abut when they are in closed and latched position.

Contained in the breech block 18, to serve the barrels 13 and 14, respectively, are ring pins 20 and 21, each of which is functionally movable in a bore provided therefor and in which bores the pins have limited endwise movement. Small coiled springs 24 are applied in the bores and about the firing pins to act against collars 25 thereon and against spring seats in the bores to yieldingly hold the pins with their rear ends projecting slightly from the inner face of the breech block 18, as seen in Fig. 2.

The trigger and hammer mechanism featuring this invention is shown in Fig. 1 in its position preparatory to firing a shell contained in the lower barrel, and in Fig. 2, it is shown after firing the lower barrel and preparatory to tiring the upper barrel. The hammer is designated in its entirety by numeral 30 and the trigger is designated by numeral 31.

The hammer 30 comprises a single substantially at plate disposed in the vertical axial plane of the two barrels, just back of the breech block 18 and Within the hollow hand grip or handle portion 10. It is mounted for rotative movement on a transverse pivot pin, or shaft 34 extended horizontally therethrough and carried at its opposite ends in opposite sidewalls of the handle. At diametrically opposite points relative to the pivot pin, the plate is formed with head portions 35-36 designed, upon the spring actuated rotative movement of the plate in opposite directions, to strike against the projecting ends of the tiring pins, 2i) and 21 for the tiring of cartridges in their corresponding barrels 13 and 14. lt is shown that these hammer heads have flat striking surfaces that are substantially at right angles to each other, and which will engage the ends of the firing pins flatly, that is, in the manner in which the head 35 is shown to engage the ends of pin 2li in Fig. l, and in the manner the head 36 is shown to engage the extended rear end of pin 21 in Fig. 2.

That edge portion of the hammer plate 30 that is adjacent the rear face of the breech block 18 is curved arcuately about the axis of pin 34 as a center. Directly opposite this curved surface, the plate 30 is formed with a rearwardly extended and laterally oifset lug 40 to which one end of a straight rod 41 is pivotally attached by a pin 42. The outer end portion of this rod 41 is telescopically slidable in a tube 43 which, at its outer end, is pivotally fixed, by a pivot pin 44, to a lug 45 projecting downwardly from the top wall of the hollow handle portion. A coiled spring 47 is applied under compression about the rod and tube and this is seated at its ends against shouldered head portions on parts 41 and 43.

The trigger 31 extends downwardly through a slot 50 in the bottom wall of the hollow grip portion 10 and is protectively contained within the usual trigger guard 51. Just within the handle 10, the trigger has a rearwardly extending lever arm 52 fixed rigidly thereto and the trigger has a pivot pin 53 extended therethrough approximately at the location of its joining with the trigger for its functional support. At its rear end, the arm 52 is attached to one end of a coiled spring 56 which is attached under tension, at its other end to a lug 57 in thev handle thus to yieldingly maintain the trigger in its full line position of Fig. 2.

Pivoted on the arm 52, near its rear end, by a pivot pin 58, is the hammer cocking push pin 59. This extends upwardly and forwardly from the arm to a position lying along one side of the hammer plate 30, this side of the plate being formed below and above its mounting pivot pin 34 with rearwardly facing round seated pockets 60 and 61, these being separated by a radial projection 62 as well shown in Fig. l. The arrangement disposed along one side of the trigger arm 52, isyieldingly held in its-position of Fig. 2 relative to the trigger, by a small coiled spring 65 Which'is attached at its opposite ends to arm 52 and pin 59. This spring will yield to permit the pin to swing away from the trigger arm.V

Assuming that the parts are in position of Fig. VZand.

it` is desired to re the pistol, the userpulls on trigger 31, Aand as `it moves rearwardlyyasto the dotted line position 31x,'the upper end of push pin 59 seats in the pocket `61 as indicated by its dotted line showing61x in thatyview. ContinuedA pull on the trigger then causes the hammer plate to be rotated in aucounter clockwise direction to effect compression of spring 47 and ultimately to move fthe pivot 42 vof the telescoped rods 41-43 over the dead center line between the pivot points 34 and 44, thus permitting the spring 47 to expand and forcibly rotate the hammer plate, and cause its hammer head portion 35 to strike the tiring pin 20 toliire the cartridgev in barrel 13. The trigger and hammer mechanism then rests in position shown in Fig. 1.

' l`o iire the lower barrel, the'trigger is pulled as before, but this time the push pin 59 will be seated in pocket 60 and continued pull on the trigger causes the hammer plate to turn in a clockwise direction, thus compressing spring 47. As the telescopic rods 41-43 again pass over the dead center line between points 34 Vand Y44, -the spring expands and rotates *the hammer plate to cause its head portion 36 to strike pin 21 and thus re the cartridge in the lower barrel; t

""It'will be understood that successive pulls on the trigger eifects thel alternate firing of one, then the other, of

the barrels, each time leaving the mechanism set for the next operation. Y

The mechanism is simple, etfective, safe and inexpensive.

What we claim as new is: 1. In a gun havinga grip frame, two barrels, a breech block and tiring pins for the barrels. mounted to` the 4 upon its being triggered froml one pin Vstriking position across its dead center position relative to said toggle means, and a trigger mechanism operable on each pull of the trigger to rotate said hammer plate from its last striking position toward the other striking position to shift the toggle means over its dead center position for its actuation by said powered toggle means. Y

2. Mechanism as recited in claim- 1 wherein said hammer plate has pocket-like bearing surfaces on one face thereof Vlocated at opposite sides of the turning axis of said plate, and said triggery mechanism comprises a pivoted triggerV with a lever arm extended therefrom, and a push pin pivoted to said lever arm and extended therefrom along the pocketed face of the plate to Valternately seat in said pockets for the turning of the hammer plateV in opposite directions with successive pulls of the trigger. t V3. Mechanism as recited in claiml whereinv saidv hammerplatephas pocket-like bearing" surfaces'on one facev thereof lo'cated'at'opposite sides of the turning axis of said plate,and said trigger mechanism comprises a piv oted trigger'with a lever arm extendedtherefrom, and a push pin pivoted on A said leverarm and extended therefrom alongthe pocketedfa'ce of the plate to alternately seat in said pockets for'the turningyof the hammer platel powered toggle means comprises aV rod made up of telescopically assemb1edsections,.said rod being pivotallyY xed at itsopposite ends to the hammer plate and grip frame tooscillate across therdead center line between plate axis andthe outer connection of the rod, and'acoiled spring applied under compression about the rod-to continuously urge the Vrod sections toward their .extended relationship. v 't t Y t Y 5. Mechanism as recited inrclam l1 wherein said lspring powered means comprises a rod made up of telescopically assembled sections, said rod beingpivotally xed at its 'opposite ends tothe hammer plate and grip frame to oscillate across the'dead center line between plateV axis and the outer connection-of 4the rod, 'and a coiled spring applied under compression about the rodtocontinuously urge the rod sectionsxtoward' their extended4 relationship and spring means acting against lthe trigger and push pin to restore them to their starting positions after each triggering operation.

No references cited. i Y 

